Use case
Backup power for an RV or camper
RV backup centers on the rooftop AC — its compressor startup surge sets the minimum generator size. A soft-start kit can cut that surge substantially.
Running
2,960W
Peak surge
5,040W
Recommend
6,500W
The window ac (12k btu) drives the peak here, surging when it starts. Sizing for the running total plus that single largest surge — not the sum of every surge — gives a realistic 6,500W (6.5kW) recommendation.
Typical loads for an RV or camper
| Load | Running | Starting |
|---|---|---|
| Refrigerator | 160W | 480W |
| Household lights (LED) | 200W | 200W |
| Window AC (12k BTU) | 1300W | 3380W |
| Microwave (1000W) | 1000W | 1000W |
| TV + WiFi router | 200W | 200W |
| Phone/laptop charging | 100W | 100W |
Size your exact setup
Common questions
What size generator do I need for an RV or camper?
For this typical load set, about a 6,500W (6.5kW) class covers it — that's 2,960W running plus the largest startup surge (from the window ac (12k btu)), with a 20% margin.
Can I run more than this?
Yes — this is a representative set. Add or remove loads in the load sizer to match your exact situation and get an updated number.